Milltek High flow sports cat

Hi everyone,


iv I just got a new Milltek system with the high flow sports cat and was just thinking this is not going to be as easy as I fort to get fitted. Would I need to get a y-pipe? The problem I had was the flexxi bit is knocking so I'm sending the manifold off to Leeds today to be fixed but need to know if I need the ypipe? Help it's a 07 197 by the way.
 
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